Summary: The new sneak toggle mechanic has introduced major problems in the playability of Minecraft.

Details: There is no way to cancel sneaking by running. The current version forces you to stay sneaking, even if you press the run button. Swimming becomes much harder when sneak is set to toggle. You are forced down and the only way out is to press sneak again. This is counter intuitive and really messes with the flow of the game.

Solution: Allow the run button to cancel the player out of sneaking.

Extra: Adding the ability to cancel running by pressing the sneak button would also fix a few problems that arise from related issues.